Challenges to Performance of Clinical Trials on Vascular Access

1 University of Pittsburgh School of Medicine aCorresponding author: Dr. Theodore Yuo, Assistant Professor of Surgery, University of Pittsburgh School of Medicine Surgery South Tower, Third Floor, Room E351.3 Pittsburgh, Pennsylvania 15213 UNITED STATES, [email protected] This is an open access article distributed under the terms of the Creative Commons AttributionNonCommercial-NoDerivatives License 4.0 (CC BY-NC-ND), which permits downloading and sharing the work provided it is properly cited. The work cannot be changed in any way or used commercially without permission from the journal.